TWI241919B - Safety needle - Google Patents

Safety needle Download PDF

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Publication number
TWI241919B
TWI241919B TW093118281A TW93118281A TWI241919B TW I241919 B TWI241919 B TW I241919B TW 093118281 A TW093118281 A TW 093118281A TW 93118281 A TW93118281 A TW 93118281A TW I241919 B TWI241919 B TW I241919B
Authority
TW
Taiwan
Prior art keywords
sleeve
needle
patent application
item
bendable
Prior art date
Application number
TW093118281A
Other languages
Chinese (zh)
Other versions
TW200517158A (en
Inventor
David John Targell
Original Assignee
Nmt Group Plc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nmt Group Plc filed Critical Nmt Group Plc
Publication of TW200517158A publication Critical patent/TW200517158A/en
Application granted granted Critical
Publication of TWI241919B publication Critical patent/TWI241919B/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/3243Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/326Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/3243Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3271Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel with guiding tracks for controlled sliding of needle protective sleeve from needle exposing to needle covering position
    • A61M5/3272Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel with guiding tracks for controlled sliding of needle protective sleeve from needle exposing to needle covering position having projections following labyrinth paths
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/3243Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3245Constructional features thereof, e.g. to improve manipulation or functioning
    • A61M2005/3247Means to impede repositioning of protection sleeve from needle covering to needle uncovering position
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/3243Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/326Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user
    • A61M2005/3267Biased sleeves where the needle is uncovered by insertion of the needle into a patient's body
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/34Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
    • A61M5/346Constructions for connecting the needle, e.g. to syringe nozzle or needle hub friction fit

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

A safety needle (20) for use with a syringe including a casing (30) in which a needle (28) for injections or blood drawing is mounted. A sleeve (22) is slidably mounted in the casing (30). The sleeve (22) is biased by a spring (42) into a partially extended position, exposing only the sharp tip (26) of the needle. As the needle (28) is inserted into a patient, the sleeve (22) retracts into the casing. When the needle (28) is removed, the sleeve (22) returns to a fully extended position and by operation of a locking mechanism locks into place. The locking mechanism includes a plurality of fingers (62), at least one of which has a projection (64) formed thereon. The projection (64) travels along a track system (66) integrally formed in the inner wall (56) of the casing (30) to move from the initial sleeve position to the retracted position and then back to a locked position in which contact with the used needle (28) and reuse of the safety needle (20) is prevented.

Description

1241919 玫、發明說明: 【發明所屬之技術領域】 本發明係有關於一種與注射器及其配件併用的一改良 安全針。 5 【先前技術】 在醫藥工業中,射出I置,如注射器及針每天均在使 用。安全上必須注意,以防止使用者,放血醫師,護士, 醫生或技術人員與用後的針接觸,且潛在地傳遞與血液有 關的疾病。此外,必須留心避免重覆使用同一針。 10 習知技藝已提供安全針,其包括在針頭的圍繞關係下 定位的一可滑動套筒,如本發明之受讓者的美國專利 4,813,940及5,104,384中所揭露者。一套筒覆蓋針的軸,以 尖銳的針先在使用4暴露。當針插入病人身上時,套筒與 病人接觸,並靠著一彈簧的偏動力縮回至安全針套筒殼體 15内。當針自病人身上移開時,套筒維持與病人接觸,直到 針完全移開,然後,套筒回到其完全延伸的位置,覆蓋住 針的用過尖端。套筒的端大體上朝向直徑小到足以防止人 們以手指與針接觸之-開口逐漸尖細。一旦套筒在使用注 射杰後’位在完全延伸位置,安全針備有用以鎖住套筒於 20 該位置的裝置。 用以在使用女全針之後鎖住套筒位置的一特別習知裝 置G括木5又在安全針殼體中的_軸襯。套筒備有接合形成 在軸襯上的-轨道。當套筒移動至針筒中時,突出部跟隨 著由轨道界疋的路徑,使得當套筒回到其延伸位置時,突 1241919 出部被引導至一固鎖機構中。一旦突出部容納在固鎖機構 中’套筒被阻止縮回並暴露用後的針。 固鎖套筒之延伸位置的此方法之問題在於,在該裝置 使用後,執道及形成在軸襯上的固鎖機構為易碎的,且容 5易破損,以允許套筒縮回,並再次暴露針。此外,由於安 全針的小尺寸,模造軸襯十分困難。安全針亦由於其零件 小且易碎的特性而很難組合。 最好可備置具有一較牢固設計的安全針,纟備置一改 良的固鎖可滑動套筒於一延伸位置的方法。 1〇 【發明内容】 本發明備置-安全針,其與具有—套筒以避免使用用 過的針及被用後的針接觸的注射器併用。 本發明包括-殼體,其中架設一針,而該針與一皮7 15 注射器或靜脈切開裳置併用。一套筒可滑動地架設在殼谱 中。該套筒以-彈簧偏動於—部份延伸位置,針的尖綱 暴露在其中’但針的主要軸以殼體圍住。當針插入病人時 套筒的端與病人接觸。殼體#著彈簧的偏動縮回至 中,並在針插人時維持與病人接觸,因而阻止針的果露’ 當針移開時,㈣叫其完钱伸位置,衫住污毕。 尖’且藉由-固鎖機構之操作鎖蚊位,因而阻止: 的針接觸及針的再使用。 、用4 套筒備置數個指形部,至少其一之上具有一突 該突出部接合-體成型於安全針殼體之内壁中的一執^ 、先m谷納在形成在套筒的最初位置下的殼體心 20 1241919 的一凹六中。當針自病人身上移開時,套筒延伸,而突出 部通過該通路。突出部藉由形成在執道系統中的一凸輪輪 廓引導至一第二通路部中。突出部離開通路,而指形部接 合形成在殼體中的一環形脊,以固鎖套筒在一延伸位置, 5 並防止與針接觸。 本發明的一優點在於安全針容易組合,包括其較習知 裝置具有較不易碎的構件,且構件較少。 本發明的另一優點在於安全針包括一改良且簡化的無 易碎構件之固鎖機構。 10 本發明的另一優點在於安全針具有一較牢固設計,其 減少組合的困難,且減少固鎖機構打破的可能性,如此可 允許套筒在針使用後再次縮回。 本發明的上述及其他特徵以及達成它們的方法將在下 文配合實施例及圖式之說明而更加清楚,其中: 15 第1圖為依據本發明的一安全針之立體圖,其套筒在部 份延伸位置; 第2圖為第1圖之針的立體圖,其套筒在一縮回位置; 第3圖為第1圖之針的立體圖,其套筒在完全延伸固鎖 位置; 20 第4圖為沿著線4-4所取的第1圖之針的截面圖; 第5圖為沿著線5-5所取的第2圖之針的截面圖; 第6圖為沿著線6-6所取的第3圖之針的截面圖; 第7圖為第1圖之針的一剖面立體圖; 第8圖為沿著線8-8所取的第7圖之針殼體的截面圖; 1241919 第9圖為沿著線9-9所取的第7圖之針殼體的截面圖; 第10圖為沿著線10-10所取的第7圖之針殼體的截面 圖; 第11圖為沿著線11-11所取的第7圖之針殼體的截面 5 圖; 第12圖為沿著線12-12所取的第7圖之針殼體的一部份 之斷面立體圖; 第13圖為第12圖的針殼體之一部份的斷面立體圖,其 顯示固鎖指形部在一架設的最初位置; 10 第14圖為第12圖的針殼體之一部份的斷面立體圖,其 顯示固鎖指形部在套筒縮回時自最初位置移動; 第15圖為第12圖的針殼體之一部份的斷面立體圖,其 顯示固鎖指形部在套筒完全縮回的一位置; 第16圖為第12圖的針殼體之一部份的斷面立體圖,其 15 顯示固鎖指形部在套筒延伸時朝向固鎖位置移動;而 第17圖為第12圖的針殼體之一部份的斷面立體圖,其 顯示的固鎖指形部,當套筒完全延伸時在固鎖位置。 【實施方式1 在圖式中的對應部份以對應標號表示。雖然以下將說 20 明本發明的數個實施例,該實施例不應限制本發明的範圍。 現在參看第1、2及3圖,安全針20為與一基本的注射器 (未顯示)併用之一改良針。安全針20備有一可滑動套筒22。 參看第1圖,套筒22在其最初位置,其中針28的尖銳尖端26 被套筒22的端24暴露。套筒22靠著彈簧42之偏動向後移 1241919 動’但可阻止朝向尖銳針尖端26移動。 當使用安全針20時,針尖端26插入病人身上,造成套 筒端24與病人皮膚接觸。當針插入繼續時,套筒22朝向第2 圖之位置縮回。在此位置下,套筒22維持與病人接觸,因 5而針28不會暴露出。一旦安全針20已使用,且自病人身上 移開’套筒22滑動回到其完全延伸位置。 套筒22向外延伸超過第1圖之最初位置,進入第3圖中 所示的固鎖位置,因而阻止人們不小心地接觸一用過的針 28,同時阻止安全針2〇之再使用。 10 就病人必須自己注射的特別應用,或病人為恐針者的 狀況而言,本發明的設計可改良,以允許針的套筒在其最 初位置,以完全覆蓋並藏住針。針套筒亦可以一不透明材 料製成。 參看第4、5、6及7圖,安全針2〇在最初縮回及固鎖位 15 置。安全針20包括外殼體30,其中套筒22可滑動地架設於 其中。殼體30大體上為具有開放端32及34的圓筒形。軸襯 36固定在端32内’以關閉端32,並捕捉套筒22於殼體30内。 針架38固定至殼體30的相對端,其中針28固定地架設。軸 襯36及針架38以螺紋固定在殼體30的端32及34上;然而, 20 軸襯36及針架38可以任何適合方法固定至殼體3〇。針架38 備置容納端40,以與一注射器(未顯示)接合。定位在殼體3〇 内的是接合針架38及套同22的彈簣42,其偏動套筒22至其 在第4圖的最初位置,並在套筒22縮回後,回復套筒22至第 6圖之延伸固鎖位置。 1241919 套筒22具有主要定位在殼體30内的中間主要本體部 44,以及自主要本體部向外延伸的錐形端部46。當安全針 20組合以覆蓋第4圖中所示的針28之尖銳尖端26之外的所 有部份後,錐形端部46通過軸襯36。當架設在殼體3〇中時, 5 錐形端部46以及套筒22的主要本體部44之至少一部份通過 軸襯36上的開口 48。軸襯開口 48的直徑大於主要本體部44 的外徑,使得主要本體部44可相對於軸襯36可滑動地移動。 軸襯36另包括接合殼體30的端32之突緣部50,以及接 合形成在殼體内壁56上的螺紋54之螺紋52。可使用任何其 10他適合連接軸襯36及殼體30之裝置。開口58界定在錐形端 部46的端60上,在安全針20使用時,針28的端况通過該開 口。開口 58的尺寸大到足以允許針28的通過,但小到足以 阻止人的手指碰觸到錐形端部46中,並接觸針28。 套筒主要本體部44的相對端備有數個彈性指形部62。 15指形部62一體成型地繞著主要本體部44的上端形成。指形 口P 62自主要本體部44以相對於主要本體部44的中心縱軸的 角度向外延伸’並接合殼體30的内壁56,以下將細述。 指形部62為彈性的,且可朝向套筒22的中心縱軸向内彎 曲。至少指形部62之一備有突出部64,其跟隨一體成型地 20幵^成在奴體内壁56上的執道系統66,以促成套筒22在安全 針20使用後鎖在其延伸位置。指形部62另界定杯形孔穴 68,其中容納彈簧42的端7〇,以施加偏動力量至孔穴沾的 底72。若套筒22移動至殼體30之外超過第6圖之固鎖位置, 軸襯開口 48的邊緣74可以由指形部62界定的脊76接合,以 1241919 阻止套筒22自殼體3〇中離開。 針架38藉由接合端34及螺紋80的突緣部%以螺紋固定 至设體30的端34,而螺紋80接合形成在殼體内壁56上的螺 紋82。可使用任何其他適合的裝置連接針架兕及殼體3〇。 5針架38包括中間部份84,針28通過其中延伸,且以任何適 合方法穩固地架設。定位在與中間部份84具有圍繞關係的 是環形壁86,其與中間部份84共同界定孔穴挞,在其中容 納彈簧42的端90。當安全針纖合後,中間部份84延伸至 彈黃42的中間。針架38亦備有容納端4〇,其自與殼體%的 接合向外延伸。 谷納知40包括環形壁92,其界定針28之端96延伸至該 處的孔八94。-注射器固定至安全針2〇的容納端4〇,使得 針28與注射器流體地相通。 、安全針20的構件以任何消毒且耐㈣適合醫療級材料 15製成。套筒22,殼體3〇,軸襯S6及針架如可以任何適合的 方法,包括射出成型模造法以塑膠材料製成。針28為以醫 療級不銹鋼或其他適合材料製成的習知針。彈簧42為可以 在安王針20使用時對抗偏動力量的塑膠或金屬材料製 彈簧。 、 、參看第7-17圖,殼體3〇的内壁%包括一執道系統的, 从利套M22之固鎖。執道系、祕包括兩個定位在殼體糊 轴向相制邊上的對稱軸對之㈣純·及嶋,各系 、先以在‘形部62上的-突出部64接合。執道系統6从、編 各自’口著⑰咖的-大體上縱向部份而延伸的—加厚壁部 11 1241919 98界定。形成在該加厚壁部98的是一縱向延伸通路1〇〇。 架設坡道102朝向平板104傾斜。定位在平板1〇4的相對 側邊上的是凹穴106,突出部64在套筒22組合至殼體3〇後容 納在其中。通路1〇〇之自凹穴106朝向殼體3〇的端34之寬度 5大約為毗鄰平板1〇4而定位的通路部1〇8之寬度的兩倍。當 安全針20使用時’在加厚壁部98上的通路部1〇8寬度的減少 界定引導突出部64朝向固鎖位置的—凸輪輪肺〇。加厚壁 部98的邊緣112在標號114處稍許在下方切開,以與指形部 62之尖端形成一固鎖的干擾固定。 10 在安全針20組合時,套筒22與殼體30組合在一起,而 備有突出部64的彈性指形部62藉由使用引導備有在坡道上 的突出部之指形部至殼體中的一組合工具與架設坡道1〇2 對齊,且亦朝向主要軸向内地偏斜其餘的指形部,使得它 們可繞過固鎖裝置。冑出部64滑動橫跨過平板1〇4,且容納 15在凹穴106中(第13圖)。然後,轴概36以螺紋固定至殼體3〇, 而彈簧42定位在殼體3〇中,以端7〇容納在杯形孔穴68中。 然後,當彈箐42的卿與界定在針架38上的孔㈣對齊 時,針28通過彈簣42,進入套筒22中。然後,針架38固定 至殼體30的端34,壓縮彈簧42並偏動突出部料成與凹穴ι〇6 20的邊緣118接觸。組合後,安全針2〇在第⑻圖顯示的位 置,而在使用前套筒22暴露針28的端26。 在安全針2__,突出部64沿著㈣系祕移動, 以引導套筒22至固鎖位置。安全針2〇靠著病人的皮膚,而 針28牙過其皮膚。然後,套筒22的錐形端部46與病人接觸。 12 1241919 在注射時,套筒22的端60維持與病人接觸,使得針以不被 暴露。此時,套筒22在第2及5圖中顯示位置。在注射時, 突出部64滑至凹穴106之外,離開加厚壁部卯,並朝向縱向 通路100之端120移動,如第14、15圖所示。當針28自病人 5身上移開後,由於彈簧42的偏動力量套筒22開始回到第3、 6圖之延伸位置。當套筒22自殼體3〇延伸時,突出部⑽沿著 通路100滑動。突出部64與引導突出部64進入通路部ι〇8的 凸輪輪廓110接觸,如第16圖所示。當突出部64跟隨著凸輪 輪廓110時,套筒22以順時鐘方向轉動,以通過通路部1〇8。 1〇 然而,須知,藉由使用適合的執道系統,轉動可以順 時鐘或逆時鐘方向完成。套筒22繼續自殼體30延伸。直到 指形部62離開加厚壁部98,並向外彎曲,以與下切部ιΐ4接 合,如第17圖所示。突出部64及下切部114之間的接合固鎖 住套筒22的位置,因而阻止套筒22回到其縮回位置,而暴 15 露針28。 須知’圖中所示的指形部62與套筒22 —體成型,而軌 道系統66與殼體30一體成型,然而,指形部亦可為殼體3〇 的一部份,而執道可為套筒22的一部份· 本發明已藉由例示實施例說明如上,但在本發明的精 20神及範圍内本發明可作改良。因此,此申請案應涵蓋使用 本發明之原則的任何改變,使用或改良。 【圖式簡單說明】 第1圖為依據本發明的一安全針之立體圖,其套筒在部 份延伸位置; 13 1241919 第2圖為第1圖之針的立體圖,其套筒在一縮回位置; 第3圖為第1圖之針的立體圖,其套筒在完全延伸固鎖 位置; 第4圖為沿著線4-4所取的第1圖之針的截面圖; 5 第5圖為沿著線5-5所取的第2圖之針的截面圖; 第6圖為沿著線6-6所取的第3圖之針的截面圖; 第7圖為第1圖之針的一剖面立體圖; 第8圖為沿著線8-8所取的第7圖之針殼體的截面圖; 第9圖為沿著線9-9所取的第7圖之針殼體的截面圖; 10 第10圖為沿著線10-10所取的第7圖之針殼體的截面 圖, 第11圖為沿著線11-11所取的第7圖之針殼體的截面 圖; 第12圖為沿著線12-12所取的第7圖之針殼體的一部份 15 之斷面立體圖; 第13圖為第12圖的針殼體之一部份的斷面立體圖,其 顯示固鎖指形部在一架設的最初位置; 第14圖為第12圖的針殼體之一部份的斷面立體圖,其 顯示固鎖指形部在套筒縮回時自最初位置移動; 20 第15圖為第12圖的針殼體之一部份的斷面立體圖,其 顯示固鎖指形部在套筒完全縮回的一位置; 第16圖為第12圖的針殼體之一部份的斷面立體圖,其 顯示固鎖指形部在套筒延伸時朝向固鎖位置移動;而 第17圖為第12圖的針殼體之一部份的斷面立體圖,其 14 1241919 顯示的固鎖指形部,當套筒完全延伸時在固鎖位置。 【圖式之主要元件代表符號表】 20 安全針 64 突出部 22 套筒 66 軌道系統 24 端 66A 執道系統 26 尖端 66B 執道系統 28 針 68 孔穴 30 殼體 70 端 32 端 72 底 34 端 74 邊緣 36 軸襯 76 脊 38 針架 78 突緣部 40 容納端 80 螺紋 42 彈簧 82 螺紋 44 主要本體部 84 中間部份 46 錐形端 86 環形壁 48 開口 88 孔穴 50 突緣部 90 端 52 螺紋 92 環形壁 54 螺紋 94 孔穴 56 内壁 96 端 58 開口 98 加厚壁部 60 端 100 通路 62 指形部 102 架設坡道 15 1241919 104 平板 112 邊緣 106 凹穴 118 邊緣 108 通路部 120 端 110 凸輪輪靡 161241919 Description of the invention: [Technical field to which the invention belongs] The present invention relates to an improved safety needle for use with a syringe and its accessories. 5 [Prior art] In the pharmaceutical industry, injection devices such as syringes and needles are used every day. Safety precautions must be taken to prevent users, bleed physicians, nurses, doctors, or technicians from coming into contact with the needle after use and potentially transmitting blood-related diseases. Also, care must be taken to avoid repeated use of the same needle. 10 Conventional techniques have provided safety needles that include a slidable sleeve positioned in a surrounding relationship of the needles, as disclosed in U.S. Patents 4,813,940 and 5,104,384 to the assignee of the present invention. A sleeve covers the shaft of the needle and is exposed with a sharp needle before use. When the needle is inserted into the patient, the sleeve contacts the patient and is retracted into the safety needle sleeve housing 15 by the biasing force of a spring. When the needle is removed from the patient, the sleeve remains in contact with the patient until the needle is completely removed, and then the sleeve returns to its fully extended position, covering the used tip of the needle. The end of the sleeve is generally small enough to prevent people from touching the needle with their fingers-the opening tapers. Once the sleeve is in the fully extended position after the injection is in use, a safety pin is provided to lock the sleeve in the 20 position. A special well-known device for locking the position of the sleeve after the female full needle is used is a bushing in the safety needle housing. The sleeve is provided with a track which is formed on the bushing. When the sleeve moves into the syringe, the protrusion follows the path of the track boundary, so that when the sleeve returns to its extended position, the protrusion 1241919 is guided into a locking mechanism. Once the projection is received in the locking mechanism, the 'sleeve is prevented from retracting and exposing the needle after use. The problem with this method of locking the extended position of the sleeve is that after the device is used, the locking mechanism formed on the bushing and formed on the bushing is fragile, and the volume 5 is easily damaged to allow the sleeve to retract, And expose the needle again. In addition, due to the small size of the safety pin, it is difficult to mold the bushing. Safety pins are also difficult to combine due to their small and fragile characteristics. It is preferable to prepare a safety pin having a relatively sturdy design, and a method of placing an improved lockable sliding sleeve in an extended position. 10 [Summary of the Invention] The present invention provides a safety needle which is used in combination with a syringe having a sleeve to avoid contact between a used needle and a used needle. The invention includes a housing, in which a needle is set, and the needle is used in combination with a skin 7 15 syringe or venous incision. A sleeve is slidably mounted in the shell spectrum. The sleeve is biased by a spring to a partially extended position with the tip of the needle exposed, but the main axis of the needle is surrounded by a housing. The end of the sleeve is in contact with the patient when the needle is inserted into the patient. The shell # retracts to the middle of the spring, and maintains contact with the patient when the needle is inserted, thus preventing the dew of the needle. When the needle is removed, it screams at its full extension position, and the shirt is stained. The tip 'also locks the mosquito bit by the operation of the -lock mechanism, thus preventing the needle contact and the reuse of the needle. 4. Use a 4 sleeve to prepare several finger-shaped parts, at least one of which has a protrusion that engages with the protrusion-a shape formed in the inner wall of the safety needle housing. In the initial position, the housing core 20 1241919 is recessed in six. When the needle is removed from the patient, the sleeve extends and the protrusion passes through the passage. The protruding portion is guided into a second passage portion by a cam profile formed in the service system. The protrusions leave the passage, and the fingers are joined to form an annular ridge in the housing to lock the sleeve in an extended position and prevent contact with the needle. One advantage of the present invention is that the safety needle is easy to assemble, including that it has less fragile components and fewer components than conventional devices. Another advantage of the present invention is that the safety needle includes an improved and simplified locking mechanism without fragile components. 10 Another advantage of the present invention is that the safety needle has a stronger design, which reduces the difficulty of assembly and reduces the possibility of breaking the locking mechanism, which allows the sleeve to be retracted again after the needle is used. The above and other features of the present invention and the methods for achieving them will be made clearer with the description of the embodiments and drawings below, where: FIG. 1 is a perspective view of a safety needle according to the present invention, the sleeve of which is in part Extended position; Figure 2 is a perspective view of the needle of Figure 1 with its sleeve in a retracted position; Figure 3 is a perspective view of the needle of Figure 1 with its sleeve in the fully extended locking position; 20 Figure 4 Is a cross-sectional view of the needle of Fig. 1 taken along line 4-4; Fig. 5 is a cross-sectional view of the needle of Fig. 2 taken along line 5-5; and Fig. 6 is taken along line 6- Fig. 6 is a sectional view of the needle of Fig. 3; Fig. 7 is a sectional perspective view of the needle of Fig. 1; Fig. 8 is a sectional view of the needle housing of Fig. 7 taken along line 8-8 1241919 Figure 9 is a sectional view of the needle housing of Figure 7 taken along line 9-9; Figure 10 is a sectional view of the needle housing of Figure 7 taken along line 10-10; Fig. 11 is a sectional view of the needle housing of Fig. 7 taken along line 11-11, and Fig. 12 is a part of the needle housing of Fig. 7 taken along line 12-12. Sectional perspective view; Figure 13 is for Figure 12 A sectional perspective view of a part of the housing, which shows the initial position of the locking finger in an erection; 10 Fig. 14 is a sectional perspective view of a part of the needle housing of Fig. 12, which shows the fixed lock The finger moves from the initial position when the sleeve is retracted; FIG. 15 is a cross-sectional perspective view of a portion of the needle housing shown in FIG. Figure 16 is a sectional perspective view of a portion of the needle housing of Figure 12, and 15 shows the locking finger moving toward the locked position when the sleeve is extended; and Figure 17 is the needle of Figure 12 A cross-sectional perspective view of a portion of the housing, showing the locking fingers in the locked position when the sleeve is fully extended. [Embodiment 1] Corresponding parts in the drawings are indicated by corresponding reference numerals. Although several embodiments of the invention will be described below, this embodiment should not limit the scope of the invention. Referring now to Figures 1, 2 and 3, the safety needle 20 is a modified needle in combination with a basic syringe (not shown). The safety needle 20 is provided with a slidable sleeve 22. Referring to FIG. 1, the sleeve 22 is in its initial position with the sharp tip 26 of the needle 28 exposed by the end 24 of the sleeve 22. The sleeve 22 moves backward 1241919 by the bias of the spring 42 but prevents the movement toward the sharp needle tip 26. When the safety needle 20 is used, the needle tip 26 is inserted into the patient, causing the sleeve end 24 to come into contact with the patient's skin. As the needle insertion continues, the sleeve 22 is retracted toward the position shown in FIG. 2. In this position, the sleeve 22 remains in contact with the patient, and the needle 28 will not be exposed due to 5. Once the safety needle 20 has been used, the ' sleeve 22 is removed from the patient and slid back to its fully extended position. The sleeve 22 extends outward beyond the initial position in Fig. 1 into the locked position shown in Fig. 3, thereby preventing people from accidentally touching a used needle 28 and preventing the safety needle 20 from being reused. 10 For special applications where the patient must inject itself, or where the patient is a needle scarer, the design of the present invention can be modified to allow the needle sleeve to be in its original position to completely cover and hide the needle. The needle sleeve may also be made of an opaque material. Referring to Figures 4, 5, 6 and 7, the safety pin 20 is initially retracted and locked in position 15. The safety needle 20 includes an outer housing 30, with a sleeve 22 slidably mounted therein. The housing 30 is substantially cylindrical with open ends 32 and 34. The bushing 36 is fixed in the end 32 'to close the end 32 and capture the sleeve 22 in the housing 30. The needle holder 38 is fixed to the opposite end of the housing 30, with the needle 28 fixedly erected. The bushing 36 and the needle holder 38 are screwed to the ends 32 and 34 of the housing 30; however, the bushing 36 and the needle holder 38 may be fixed to the housing 30 by any suitable method. The needle holder 38 is provided with a receiving end 40 to be engaged with a syringe (not shown). Positioned within the housing 30 is a spring 42 that engages the needle holder 38 and the sleeve 22, and biases the sleeve 22 to its initial position in FIG. 4 and returns to the sleeve after the sleeve 22 is retracted. 22 to 6 extended lock position. 1241919 The sleeve 22 has an intermediate main body portion 44 positioned mainly within the housing 30, and a tapered end portion 46 extending outwardly from the main body portion. When the safety needle 20 is assembled to cover all but the sharp tip 26 of the needle 28 shown in FIG. 4, the tapered end portion 46 passes through the bushing 36. When erected in the housing 30, at least a part of the 5 tapered end portion 46 and the main body portion 44 of the sleeve 22 passes through the opening 48 in the bushing 36. The diameter of the bushing opening 48 is larger than the outer diameter of the main body portion 44 so that the main body portion 44 can be slidably moved relative to the bushing 36. The bushing 36 further includes a flange portion 50 that engages the end 32 of the casing 30, and a thread 52 that engages a thread 54 formed on the inner wall 56 of the casing. Any other device suitable for connecting the bushing 36 and the housing 30 may be used. An opening 58 is defined on the end 60 of the tapered end portion 46 through which the end of the needle 28 passes when the safety needle 20 is in use. The opening 58 is large enough to allow the needle 28 to pass, but small enough to prevent a human finger from touching the tapered end 46 and contacting the needle 28. Opposite ends of the sleeve main body portion 44 are provided with a plurality of elastic finger portions 62. The 15-finger portion 62 is formed integrally around the upper end of the main body portion 44. The finger opening P 62 extends outward from the main body portion 44 at an angle relative to the central longitudinal axis of the main body portion 44 and engages the inner wall 56 of the housing 30, as will be described in detail below. The fingers 62 are elastic and can be bent inwardly toward the center longitudinal axis of the sleeve 22. At least one of the finger portions 62 is provided with a protruding portion 64 that follows the integrally formed guiding system 66 on the inner wall 56 of the slave body to facilitate the sleeve 22 to lock in its extended position after the safety needle 20 is used. . The finger 62 further defines a cup-shaped cavity 68 in which the end 70 of the spring 42 is received to apply a biasing force to the bottom 72 of the cavity. If the sleeve 22 moves beyond the housing 30 beyond the locked position of FIG. 6, the edge 74 of the bushing opening 48 may be engaged by a ridge 76 defined by the finger 62 to prevent the sleeve 22 from the housing 3 121919. Leave. The needle holder 38 is screw-fixed to the end 34 of the body 30 by the joint end 34 and the flange portion of the thread 80, and the thread 80 engages a thread 82 formed on the inner wall 56 of the housing. The needle holder 连接 and the housing 30 can be connected using any other suitable device. The 5-needle holder 38 includes a middle portion 84 through which the needle 28 extends and is securely erected by any suitable method. Positioned in a surrounding relationship with the middle portion 84 is an annular wall 86 which, in conjunction with the middle portion 84, defines a hole tart in which the end 90 of the spring 42 is received. When the safety needle is plied, the middle portion 84 extends to the middle of the elastic yellow 42. The needle holder 38 is also provided with a receiving end 40 which extends outwardly from the engagement with the housing. Gunner 40 includes an annular wall 92 that defines a hole 96 at which the end 96 of the needle 28 extends. The syringe is secured to the receiving end 40 of the safety needle 20 so that the needle 28 is in fluid communication with the syringe. The components of the safety needle 20 are made of any sterilized and resistant medical-grade material 15. The sleeve 22, the housing 30, the bush S6, and the needle holder may be made of plastic material by any suitable method, including injection molding. The needle 28 is a conventional needle made of medical grade stainless steel or other suitable material. The spring 42 is a spring made of a plastic material or a metal material that can resist the bias force when the Awang needle 20 is used. See Figures 7-17. The inner wall% of the housing 30 includes an anchoring system. The practice system and the secret system include two pairs of symmetry axes located on the axially opposite sides of the shell paste, and each of them is first joined by the -protruding portion 64 on the ‘shaped portion 62. The control system 6 is defined from the thickened wall portion 11 1241919 98, which extends from each of the mouth's-generally longitudinal portions. Formed in the thickened wall portion 98 is a longitudinally extending passage 100. The erection ramp 102 is inclined toward the flat plate 104. Positioned on the opposite side of the flat plate 104 is a recess 106, and the protrusion 64 is received in the sleeve 22 after being assembled to the housing 30. The width 5 of the end 100 of the passage 100 from the recess 106 toward the housing 30 is approximately twice the width of the passage portion 108 positioned adjacent to the flat plate 104. When the safety needle 20 is in use ', the reduction in the width of the passage portion 108 on the thickened wall portion 98 defines a cam wheel lung that guides the protruding portion 64 toward the locked position. The edge 112 of the thickened wall portion 98 is slightly cut below at the reference numeral 114 to form a locking interference fixation with the tip of the finger portion 62. 10 When the safety needle 20 is combined, the sleeve 22 is combined with the housing 30, and the elastic finger portion 62 provided with the protrusion 64 is guided to the housing by using the finger portion provided with the protrusion on the ramp. One of the combined tools is aligned with the erection ramp 102 and also deflects the remaining fingers inwardly towards the main axis so that they can bypass the locking device. The protuberance 64 slides across the flat plate 104 and is received 15 in the recess 106 (Fig. 13). Then, the shaft shaft 36 is fixed to the housing 30 with a thread, and the spring 42 is positioned in the housing 30 and received in the cup-shaped cavity 68 at the end 70. Then, when the shell of the impeachment 42 is aligned with the hole 界定 defined on the needle holder 38, the needle 28 passes through the impulse 42 and enters the sleeve 22. Then, the needle holder 38 is fixed to the end 34 of the housing 30, the spring 42 is compressed and the protruding portion is biased into contact with the edge 118 of the cavity 206. After assembly, the safety needle 20 is in the position shown in the first figure, and the sleeve 22 exposes the end 26 of the needle 28 before use. At the safety needle 2__, the protrusion 64 moves along the stern line to guide the sleeve 22 to the locked position. The safety needle 20 rests on the patient's skin and the needle 28 passes over its skin. The tapered end 46 of the sleeve 22 then comes into contact with the patient. 12 1241919 During the injection, the end 60 of the sleeve 22 remains in contact with the patient so that the needle is not exposed. At this time, the sleeve 22 is shown in a position in FIGS. 2 and 5. During injection, the protruding portion 64 slides out of the cavity 106, leaves the thickened wall portion 卯, and moves toward the end 120 of the longitudinal passage 100, as shown in Figs. 14 and 15. After the needle 28 is removed from the patient 5, the sleeve 22 starts to return to the extended position of Figs. 3 and 6 due to the biasing force of the spring 42. When the sleeve 22 extends from the housing 30, the projection ⑽ slides along the passage 100. The protruding portion 64 is in contact with the cam profile 110 which guides the protruding portion 64 into the passage portion 08, as shown in FIG. When the protruding portion 64 follows the cam profile 110, the sleeve 22 rotates in a clockwise direction to pass through the passage portion 108. 1〇 However, it should be noted that by using a suitable guidance system, the rotation can be done clockwise or counterclockwise. The sleeve 22 continues to extend from the housing 30. Until the finger portion 62 leaves the thickened wall portion 98 and is bent outward to engage the undercut portion ιΐ4, as shown in FIG. The engagement between the protruding portion 64 and the undercut portion 114 securely locks the position of the sleeve 22, thereby preventing the sleeve 22 from returning to its retracted position, and the needle 28 is exposed. Note: The finger portion 62 shown in the figure is integrally formed with the sleeve 22, and the track system 66 is integrally formed with the casing 30. However, the finger portion can also be a part of the casing 30, and the way It may be part of the sleeve 22. The present invention has been described above by way of exemplary embodiments, but the present invention can be improved within the spirit and scope of the present invention. This application is therefore intended to cover any variations, uses, or adaptations of the principles of the invention. [Brief description of the drawings] Figure 1 is a perspective view of a safety needle according to the present invention, with its sleeve in a partially extended position; 13 1241919 Figure 2 is a perspective view of the needle of Figure 1 with its sleeve retracted Position; Figure 3 is a perspective view of the needle of Figure 1 with its sleeve in the fully extended locking position; Figure 4 is a sectional view of the needle of Figure 1 taken along line 4-4; 5 Figure 5 Is a cross-sectional view of the needle of Fig. 2 taken along line 5-5; Fig. 6 is a cross-sectional view of the needle of Fig. 3 taken along line 6-6; Fig. 7 is a needle of Fig. 1 A sectional perspective view of Fig. 8 is a sectional view of the needle housing of Fig. 7 taken along line 8-8; Fig. 9 is a drawing of the needle housing of Fig. 7 taken along line 9-9 Sectional view; 10 Figure 10 is a sectional view of the needle housing of Figure 7 taken along line 10-10, and Figure 11 is a sectional view of the needle housing of Figure 7 taken along line 11-11 Figure 12 is a perspective view of a part 15 of the needle housing of Figure 7 taken along line 12-12; Figure 13 is a sectional view of a part of the needle housing of Figure 12 A perspective view showing the initial position of the locking fingers in an erection; FIG. 14 Fig. 12 is a sectional perspective view of a part of the needle housing showing the locking finger moving from the initial position when the sleeve is retracted; Fig. 15 is a part of the needle housing of Fig. 12 A cross-sectional perspective view showing a position where the locking finger portion is fully retracted in the sleeve; FIG. 16 is a sectional perspective view of a portion of the needle housing of FIG. 12 showing the locking finger portion in The sleeve moves toward the locking position when the sleeve is extended; and FIG. 17 is a sectional perspective view of a part of the needle housing shown in FIG. Lock position. [Representative symbols for the main components of the figure] 20 safety pin 64 protrusion 22 sleeve 66 track system 24 end 66A guide system 26 tip 66B guide system 28 pin 68 hole 30 housing 70 end 32 end 72 bottom 34 end 74 Edge 36 Bushing 76 Ridge 38 Needle holder 78 Flange portion 40 Receiving end 80 Thread 42 Spring 82 Thread 44 Main body portion 84 Middle portion 46 Conical end 86 Ring wall 48 Opening 88 Cavity 50 Flange portion 90 End 52 Thread 92 Annular wall 54 Thread 94 Cavity 56 Inner wall 96 End 58 Opening 98 Thickened wall 60 End 100 Path 62 Finger section 102 Erection ramp 15 1241919 104 Plate 112 Edge 106 Cavity 118 Edge 108 Path 120 End 110 Cam wheel 16

Claims (1)

1241919 拾、申請專利範圍: 1·種配件I置,其係與流體通過一中空針而汲入汲出的 一醫藥裝置併用,其包括: 一長形中空本體; 5 10 15 史後芏τ1奉體的一針; 圍繞該針的一套筒,該套筒往複且可移動地與該中空 本體相關’以移動至中空本體之内外’並暴露較長或較 缸的針’該套筒具有套筒覆蓋住針的長度之主要部份的 第位置以及針的長度的一部份被暴露成足以用於 一醫療程序的—第二位置,以及套筒覆蓋整枝針且固鎖 住以阻止針的任何部份之暴露的-第三位置;且 一=筒及本體之—包括—執道;而另—㈣或本體包括 關,二該止擋元件可選擇地引導式地與軌道相 二侍㈤可自第-位置移動至第二位置,之後移動 至第,位置,該止擋元件固鎖套筒於第三位置。 ==專利範圍第1項的裝置,其中止料件包括—可彎 20 3·如申請專利範圍第2項的裝置 件。 4·如申請專利範圍第2項的裝置 元件。 ,其中套筒包括該可彎曲元 其中套筒包括數個可彎曲 5. 如申請專·圍第i項的裝4,# 6. 如申請專利範圍第2項的裝 - 日軌逼。 道接合的一其令可彎曲元件包括與勒 犬出部,使得軌道料可彎曲元件。、軌 17 1241919 7. 如申請專利範圍第1項的裝置,其中該執道包括允許套筒 自第一至第二位置的一第一位置,以及允許套筒自第二 位置移動至第三位置的一第二位置。 8. 如申請專利範圍第1項的裝置,其中本體包括一止擋部, 5 而當套筒抵達第三位置時,該可彎曲元件接合止擋部。 9. 如申請專利範圍第2項的裝置,其中可彎曲元件可相對於 縱向本體之中心軸向内及向外地作軸向移動。 10.如申請專利範圍第1項的裝置,其另包括用以偏動套筒至 第一位置的一偏動彈簧。 10 11.如申請專利範圍第1項的裝置,其另包括與本體及套筒在 操作上相關的一軸襯,其用以阻止套筒與本體脫離。 12.—種配件裝置,其係與流體通過一中空針而汲入汲出的 一醫藥裝置併用,其包括: 一長形中空本體; 15 連接至中空本體的一針; 圍繞該針的一套筒,該套筒往複且可移動地與該中空 本體相關,以移入及移出中空本體’並暴露較長或較短 的針,該套筒具有套筒覆蓋住針的長度之主要部份的一 第一位置,以及針的長度的一部份被暴露成可用於一醫 20 療程序的一第二位置,以及套筒覆蓋整枝針且固鎖住以 阻止針的任何部份暴露的一第三位置;且 該套筒包括一可彎曲指形部,而本體包括一軌道,該 可彎曲指形部與軌道具有操作及引導上的相關性,使得 套筒可自第一位置移動至第二位置,然後至第三位置, 18 1241919 且該可彎曲指形部固鎖套筒於第三位置。 13. 如申請專利範圍第12項的裝置,其中套筒包括數個指形 部且其中本體包括數個執道。 14. 如申請專利範圍第12項的裝置,其中可彎曲指形部包括 5 與執道接合的一突出部,使得執道引導可彎曲指形部。 15. 如申請專利範圍第12項的裝置,其中該執道包括允許套 筒自第一至第二位置的一第一位置,以及允許套筒自第 二位置移動至第三位置的一第二位置。 16. 如申請專利範圍第12項的裝置,其中本體包括一止擋 10 部,而當套筒抵達第三位置時,該可彎曲元件接合止擋 部。 17. 如申請專利範圍第12項的裝置,其中可彎曲元件可相對 於縱向本體之中心軸向内及向外地作軸向移動。 18. 如申請專利範圍第12項的裝置,其另包括用以偏動套筒 15 至第一位置的一偏動彈簧。 19. 如申請專利範圍第12項的裝置,其另包括與本體及套筒 在操作上相關的一軸襯,其用以阻止套筒與本體脫離。 191241919 The scope of patent application: 1. A set of accessories, which are used in conjunction with a medical device in which fluid is drawn in and out through a hollow needle, which includes: a long hollow body; 5 10 15 A needle surrounding the needle, the sleeve reciprocally and movably associated with the hollow body 'to move inside and outside the hollow body' and expose a longer or longer cylinder needle 'The sleeve has a sleeve The second position covering a major part of the length of the needle and a portion of the length of the needle are exposed enough for a medical procedure-the second position, and the sleeve covers the entire needle and is securely locked to prevent any need for the needle. Part of the exposed-the third position; and one = the tube and the body-including-the way; and the other-㈣ or the body includes the off, two stop elements can be selectively guided with the track to serve. From the first position to the second position, and then to the first position, the stop element locks the sleeve to the third position. == The device of the scope of the patent, the material stopper includes-bendable 20 3 · The device of the scope of the patent application, the second item. 4. The device element such as the item 2 of the scope of patent application. , Where the sleeve includes the bendable element, where the sleeve includes a number of bendable 5. If the application for the installation of the item i, 4 ## 6. If the application for the scope of the patent application 2-Japanese rail force. A track-engageable bendable element includes an exit portion with the dog so that the track material is bendable. Rail 17 1241919 7. The device according to item 1 of the patent application scope, wherein the channel includes a first position allowing the sleeve to move from the first to the second position, and allowing the sleeve to move from the second position to the third position A second position. 8. The device according to item 1 of the patent application, wherein the body includes a stopper, and when the sleeve reaches the third position, the flexible element engages the stopper. 9. As for the device in the scope of patent application, the flexible element can be moved axially inward and outward relative to the center of the longitudinal body. 10. The device as claimed in claim 1, further comprising a biasing spring for biasing the sleeve to the first position. 10 11. The device according to item 1 of the scope of patent application, further comprising a bushing related to the operation of the body and the sleeve, which is used to prevent the sleeve from detaching from the body. 12. An accessory device for use with a medical device in which fluid is drawn in and out through a hollow needle, comprising: an elongated hollow body; 15 a needle connected to the hollow body; a sleeve surrounding the needle The sleeve is reciprocally and movably associated with the hollow body to move in and out of the hollow body 'and expose longer or shorter needles. The sleeve has a first portion of the sleeve that covers a major portion of the length of the needle. A position, and a portion of the length of the needle is exposed to a second position that can be used for a medical procedure, and a third position where the sleeve covers the entire needle and is locked to prevent any part of the needle from being exposed ; And the sleeve includes a bendable finger portion, and the body includes a track, the bendable finger portion and the track are related in operation and guidance, so that the sleeve can be moved from the first position to the second position, Then go to the third position, 18 1241919 and the flexible finger lock sleeve is in the third position. 13. The device as claimed in claim 12, wherein the sleeve includes a plurality of fingers and the body includes a plurality of channels. 14. The device as claimed in item 12 of the patent application, wherein the bendable finger portion includes a protrusion that engages the channel, so that the channel guides the bendable finger portion. 15. The device according to item 12 of the patent application, wherein the channel includes a first position allowing the sleeve to move from the first position to the second position, and a second position allowing the sleeve to move from the second position to the third position. position. 16. The device according to claim 12, wherein the body includes a stop 10, and when the sleeve reaches the third position, the flexible element engages the stop. 17. The device according to item 12 of the patent application, wherein the flexible element can be moved axially inwardly and outwardly with respect to the center of the longitudinal body. 18. The device of claim 12 further includes a biasing spring for biasing the sleeve 15 to the first position. 19. The device according to item 12 of the patent application, further comprising a bushing related to the operation of the body and the sleeve, which is used to prevent the sleeve from being separated from the body. 19
TW093118281A 2003-11-21 2004-06-24 Safety needle TWI241919B (en)

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CA2516164A1 (en) 2005-06-09
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TW200517158A (en) 2005-06-01
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WO2005051466A1 (en) 2005-06-09
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TW200520810A (en) 2005-07-01
US20050113750A1 (en) 2005-05-26

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